national leader vs Mikhail Kalinin

national leader and Mikhail Kalinin both are nouns.

Word	Noun	Adjective	Verb	Adverb
national leader	Yes	No	No	No
Mikhail Kalinin	Yes	No	No	No

national leader (noun)	Mikhail Kalinin (noun)
a person who is a respected leader in national or international affairs	soviet statesman and head of state of the USSR (1875-1946)